Both models were designed for triple / quadruple jumps, but have slightly different features.
Ice Fly has a new look, a quick-drying inner lining, is more padded and with a more flexible structure and tongue. It’s on the feet of those who want to bend more.
Concerto has a traditional look with a snug structure and a more sustained tongue. It is the favorite of those who want to ‘feel the shoe’ and already have deep bends and need more support.